This business gives you the illusion that you can allow your kids to play without worry of child abduction. NOT TRUE! The stamp policy they use to match kids and parents is seriously flawed. I found this out when a friend who arrived 30mins after we did was allowed to leave out with my daughter. When I questioned the employee about allowing my daughter to leave with somebody else she told me "they had the same stamp". No apology given because this is not a mistake. This is just how their system works. Watch your kids.